AVS 47th International Symposium
    Surface Science Tuesday Sessions
       Session SS1-TuA

Paper SS1-TuA4
Surface Science Models of Sulfided NiW, CoW, NiMo and CoMo Hydrodesulfurization Catalysts

Tuesday, October 3, 2000, 3:00 pm, Room 208

Session: Mechanisms and Control of Surface Reactions
Presenter: G. Kishan, Eindhoven University of Technology, The Netherlands
Authors: L. Coulier, Eindhoven University of Technology, The Netherlands
G. Kishan, Eindhoven University of Technology, The Netherlands
J.W. Niemantsverdriet, Eindhoven University of Technology, The Netherlands
Correspondent: Click to Email
Industrial catalysts used in the hydrotreating of crude oil can successfully be modeled using silicon single crystals as the planar support for the catalytically relevant sulfides. Wet chemical deposition techniques on the basis of spin coating enable the preparation of these catalysts via industrially relevant chemistry. The catalytic behavior of these models in the desulfurization of thiophene to butenes has been measured in a batch reactor. Clear relations between the order in which the elements convert to sulfides and the catalytic activity have been observed: The key step in the preparation is to retard the sulfidation of Ni and Co with respect to that of Mo and W. To this end, stabilizing chelating agents may be added in the preparation stage.